Pimples, medically known as acne, is generally normal for 11-year-olds, but it may also be associated with abnormal perifollicular keratinization, propagation of Propionibacterium acnes, and other causes, which are not normal.
Eleven-year-old children have generally entered puberty, androgen levels in the body will rise, which can cause sebaceous glands to enlarge and sebum secretion to increase. The sebum and the dead skin cells that are shed may clog the pores, resulting in the formation of acne. Acne is usually normal, and may resolve on its own as the androgen levels in the body stabilize with age.
Abnormal perifollicular keratinization can lead to clogging of hair follicles and cause acne. In addition, fatty acids and other ingredients in sebum are suitable for the growth and reproduction of Propionibacterium acnes, which damages the tissues around the hair follicles, thus triggering or exacerbating acne, and then prompt medical attention is needed.
Acne at the age of 11 can be observed first and localized cleansing can be done. If the scope of acne increases or the inflammatory reaction worsens, parents are advised to bring the acne to the hospital in time for treatment by a professional doctor.